Gear-driven pump



E. LAGE.

GEAR DRIVEN PUMP.

APPLlCATiOH FILED DEC-3,1920.

Patented Aug. 2, 1921.

UNITED STATES PATENT OFFICE.

ERNST LAGE, OF KIEL-GAARDEN, GERMANY, ASSIGNOR T0 FRIED. KRUPP AKTIEN GESELLSGHAFT GERMANIAWERFT, OF KIEL-GAARDEN, GERMANY.

GEAR-DRIVEN PUMP.

Specification of Letters Patent.

' Patented Aug. 2, 1921.

Application filed December 3, 1920. Serial No. 428,079.

T 0 all '10 ho-m it may concem Be it known that I, ERNST LAGE, residing at Kiel-Gaarden, Germany, a citizen of the German Republic, have invented a certain new and useful Improvement in Gear- Driven Pumps, for which I have filed application in Germany July 13, 1918, and of which the following is a specification.

This invention relates to a gear-driven pump serving for the delivery of oil orthe like, operated directly by a high speed power engine, say a steam turbine or electromotor.

An embodiment of the subject matter of this invention is shown by way of example in the accompanying drawing, in which I Figure 1 is a vertical longitudinal section through the pump, and

Fig.2 a section along line 22 in Fig. 1, looking from above.

By means of two shafts B, C, there are lodged within the pump casing A two herring bone wheels D, E, the teeth of which are adapted to interengage. The shaft C of the wheel E extends beyond the casing and is coupled with the shaft of an electromotor F serving to rotate the wheels at a high speed in the direction indicated by the arrows m and l in Fig. 1. The liquid to be delivered (oil or the like) is drawn into the pump, during the working thereof, by. the suction connection (0 and delivered to the wheels by the intervention of speed nozzles G and H. These latter are so dimensioned that they will accord the liquid a speed which at the least will equal the peripheral velocity of the teeth of the pump wheels, so that in consequence thereof, the tooth spaces of said wheels will be filled with the liquid to be delivered in a manner entirely free from shocks and eddies. The wheels D, E deliver the liquid into the connection a whence it is conducted through a piping (not shown), connected to said connection a to the point of supply.

The two herring bone wheels D, E are each composed of two helical wheels D D and E E respectively, the teeth of which are disposed in opposite directions (Fig. 2). The two helical wheels E E constituting the driving wheel E, as also the driven wheel I), are rigidly connected to their spindles by means of wedges 0 and 6 while the fourth helical wheel D is adapted to freely rotate around its shaft B. The result of this novel arrangement is that the herring bone wheels will always cooperate satisfactorily, and hence, noiselessly,-a fact otherwise attainable but with the utmost difficulty.

The direction'of rotation of said wheels is such that at first the shanks of the herring bone teeth, and thereupon theirpoints will enter into engagement; a fact likewise contributing to the noiseless working of the pump.

By means of the above described arrangement, which is of a nature to'fully warrant the noiseless operation of the pump, the pos sibility is secured of driving the pump directly at a great number of revolutions by means of a high speed electromotor or steam turbine. The noiseless working pump will, moreover render it suitable for submarine boats.

Claims:

1. An arrangement of the class described comprising acasing provided with inlet and outlet openings, intermeshing herring-bone wheels rotatably mounted in said casing, shafts for supporting said herring-bone wheels, each of said wheels being formed in two sections, both sections of one of said wheels being keyed to its respective supporting shaft, one of the sections of the other wheel being keyed'to its supporting shaft and means for driving the first mentioned shaft.

2. A pump of the class described comprising a casing formed with inlet and out let openings, a pair of herring-bone pump wheels rotatably supported in said casing, the direction of rotation being such that pripeculiarly marily the shanks of said herring-bone teeth and subsequently the points thereof will enter into engagement, shafts for supporting said wheels, each'wheel comprising two sections, means for causing the sections of one of the wheels to rotate with its supporting.

shaft, means for causing one of the sections of the other wheel to rotate with its supporting shaft and means for rotating the first mentioned shaft.

The foregoing specification signed at Kiel, Germany, this 22d day of June, 1920.

- a ERNST LAGE. In presence ofl JoHANNEs KUEBEL, F. PURLIMAFL I of the 

